Methods for the installation of overhead transmission lines and devices thereof

ABSTRACT

A method for overhead transmission line installation includes tension pulling a transmission line over a path between a first support structure having a first mounting location and a second support structure having a second mounting location extending from the first mounting location to a first transition location on the second support structure, to a second transition location on the first support structure, and to the second mounting location. The transmission line is mounted at the first mounting location and the second mounting location. The mounting provides a slack portion of the transmission line between the first mounting location and the second mounting location. A portion of the slack portion is mounted proximate to the first mounting location or the second mounting location to provide an overhead transmission line extending between the first mounting location and the second mounting location and a remainder of the slack portion.

FIELD

This technology generally to methods for the installation of overheadtransmission lines. More specifically, this technology relates tomethods for the installation of overhead fiber optic cable transmissionlines that allow for the accumulation of necessary excess fiber opticcable during overhead installation tension pulling procedures.

BACKGROUND

The installation of overhead fiber optic cable transmission lines isoften performed using tension pulling techniques. Full tension pullingis preferred over slack-stringing and semi-tension methods, particularlyin situations where it is necessary to keep the fiber optic cable off ofthe ground or where there are energized lines beneath the fiber cabletransmission line being installed. Full tension pulling providessufficient pulling capabilities on one end of the fiber cabletransmission line and sufficient tension on the other end to keep thefiber cable transmission line clear of any obstacles during movement ofthe fiber cable transmission line from the reel it is stored on to itsfinal installed position.

However, installing the fiber cable transmission line under full tensionprovides a lack of excess cable due to the tension on the cable duringthe installation process. Excess cable, or slack, is often required tobe stored in certain locations along long pulls of fiber for laterrepairs and/or splices. In order to obtain the necessary slack after atension pull, thousands of feet of slack cable may need to be pulledback for storage. Pulling the cable back to generate the necessary slackis very labor intensive and inefficient. Further, pulling the cable backcan be hazardous when it must be performed at road or other crossingsaccessible to the public.

SUMMARY

A method for overhead transmission line installation includes tensionpulling a transmission line over a path between a first supportstructure having a first mounting location and a second supportstructure having a second mounting location. The path extends from thefirst mounting location on the first support structure to a firsttransition location on the second support structure, from the firsttransition location on the second support structure to a secondtransition location on the first support structure, and from the secondtransition location on the first support structure to the secondmounting location on the second support structure. The transmission lineis mounted at the first mounting location and the second mountinglocation. The mounting provides a slack portion of the transmission linebetween the first mounting location and the second mounting location. Aportion of the slack portion is mounted proximate to either the firstmounting location or the second mounting location to provide an overheadtransmission line extending between the first mounting location and thesecond mounting location and a remainder of the slack portion.

A kit for overhead transmission line installation includes a firstroller wheel configured to be coupled to a first support structure and asecond roller wheel configured to be coupled to a second supportstructure. The first roller wheel and the second roller wheel areconfigured to receive a transmission line for installation. The kitfurther includes a first transition device and a second transitiondevice each comprising a bracket configured be coupled to either thefirst support structure or the second support structure and a pair ofroller wheels configured to be removably coupled to the bracket.

The method of the present technology allows a user to accumulatenecessary excess fiber during overhead fiber installation tensionpulling procedures. The methods utilize a series of large rollers onportable brackets that can be attached to existing poles or temporarycross arms anywhere along long pulls where excess fiber, or slack, isneeded to be stored for later repairs and/or splices. The installationtechniques advantageously allow a user to accumulate the necessaryexcess fiber cable during the tension pulling, without having to performany fiber pull back. Accordingly, examples of methods of the presenttechnology advantageously allow for more efficient and safer tensionpulls.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exemplary environment for performing the methods ofoverhead transmission line installation of the present technology.

FIG. 2 is a flowchart for an exemplary method for the installation ofoverhead transmission lines of the present technology.

DETAILED DESCRIPTION

FIG. 1 is an exemplary environment 10 for performing the methods offiber cable transmission line installation of the present technology. Inthis example, the exemplary environment includes fiber cabletransmission line 12, utility poles 14(1) and 14(2), installationrollers 16(1) and 16(2), and bracket roller devices 18(1) and 18(2),although the exemplary environment may include other types and/ornumbers of devices, components, or elements for performing theinstallation methods of the present technology. In this example thefiber cable transmission line 12 is illustrated being installed betweenutility poles 14 and 16, although other configuration may becontemplated. The present technology provides more efficient and safermethods of fiber cable transmission line installation. In particular,the methods of the present technology advantageously generate slack,which may be utilized for access to and/or repairs of the fiber cable,during tension-pull installation of the fiber cable without the need forexcessive cable pull back.

In this example, the fiber cable transmission line 12 is a fiber optictransmission fiber, although the installation may be employed with othertypes of overhead transmission lines, such as conductive electricallines, by way of example only. The fiber cable transmission line 12 maybe any diameter fiber optic cable known in the art.

Although the utility poles 14(1) and 14(2) are illustrated, the methodmay be employed with any overhead transmission line support structureknown in the art including, by way of example only, a support structurehaving multiple cross-arms for supporting overhead transmission lines.As shown in FIG. 1, the utility poles 14(1) and 14(2) can supportadditional overhead transmission lines in addition to the fiber cabletransmission line 12, such as the illustrated primary conductor andneutral conductor, although the utility poles 14(1) and 14(2) maysupport other types and/or numbers of overhead transmission lines. Inthis example, utility poles 14(1) and 14(2) are located between 200 to300 feet apart from one another, although the installation method may beemployed over various distances.

The installation rollers 16(1) and 16(2) are located on the utilitypoles 14(1) and 14(2), respectively, for installation of the fiber cabletransmission line 12. The installation rollers 16(1) and 16(2) aretemporarily positioned on the utility poles 14(1) and 14(2) duringinstallation and are removable after the installation is complete. Theinstallation rollers 16(1) and 16(2) are located at approximately thesame height on the utility poles 14(1) and 14(2) and are placed inmounting locations 17(1) or 17(2), or proximate to mounting locations17(1) and 17(2), on the utility poles 14(1) and 14(2) to which the fibercable transmission line 12 will be attached. By way of example, asdiscussed in further detail below, the installation rollers 16(1) and16(2) may be replaced at the mounting locations 17(1) and 17(2) bymounting hardware, such as a dead end or a tangent, that securely mountsthe fiber cable transmission line 12 to the utility poles 14(1) and14(2), although other types of mounting hardware may be utilized forcoupling the fiber cable transmission line 12 to the utility poles 14(1)and 14(2). The installation rollers 16(1) and 16(2) may be anyinstallation rollers known in the art and are sized based on thediameter of the fiber cable transmission line 12 to be installed. In oneexample the installation rollers are 6″ diameter rollers, althoughinstallation rollers having other diameters may be employed. By way ofexample, installation neoprene rollers produced by Sherman+Reilly,Chattanooga, Tenn., could be utilized.

The bracket roller devices 18(1) and 18(2) each include a bracket 20(1)and 20(2), respectively, that allow the bracket roller devices 18(1) and18(2) to be temporarily coupled to the utility poles 14(1) and 14(2).The brackets 20(1) and 20(2) are coupled to the utility poles 14(1) and14(2) below the installation rollers 16(1) and 16(2) to provide an acuteangle as the fiber cable transmission line 12 traverses between aninstallation roller 16(1) or 16(2) to the opposing bracket roller device18(1) or 18(2) during installation as described in further detail below.The brackets 20(1) and 20(2) are located on the utility poles 14(1) and14(2) at transition locations 21(1) and 21(2), respectively, atapproximately the same height above the ground as one another.

The bracket roller device 18(1) further includes roller wheels 22(1) and22(2) coupled to bracket 20(1), while the bracket roller device 18(2)includes roller wheels 22(3) and 22(4) coupled to the bracket 20(2).Alternatively, each of the roller wheels 22(1)-22(4) can each have theirown bracket for installation. Although each of the bracket rollerdevices 18(1) and 18(2) is described as having two roller wheels,additional roller wheels or other mechanisms to facilitate installationcould be utilized on each of the bracket roller devices 18(1) and 18(2).The bracket roller devices 18(1) and 18(2) each include at least tworoller wheels spaced apart on the brackets 20(1) and 20(2),respectively, to ensure that the fiber cable transmission line 12 is notbent at an angle greater than the allowed manufacturer bend radiusduring installation as described in further detail below. In oneexample, the fiber cable transmission line 12 is not bent an anglegreater than 90 degrees during installation. The roller wheels22(1)-22(4) may be any roller wheels known in the art and are sized toaccommodate the fiber cable transmission line 12 being installed. By wayof example, fiber roller wheels produced by Sherman+Reilly, Chattanooga,Tenn., could be utilized.

An exemplary method for the installation of overhead cable lines,specifically fiber cable transmission line 12, will now be describedwith respect to FIGS. 1 and 2. First, in step 100 the installationrollers 16(1) and 16(2) are installed on the utility poles 14(1) and14(2), respectively. The installation rollers 16(1) and 16(2) aretemporarily positioned on the utility poles 14(1) and 14(2) forinstallation purposes. In this example, the installation rollers 16(1)and 16(2) are located at approximately the same height above the groundon the utility poles 14(1) and 14(2) and are placed in a location, orproximate to a location, on the utility poles 14(1) and 14(2) to whichthe fiber cable transmission line 12 subsequently will be attached. Theinstallation rollers 16(1) and 16(2) are coupled to the utility poles14(1) and 14(2) using any coupling method known in the art.

Next, in step 102, the bracket roller devices 18(1) and 18(2) areinstalled on the utility poles 14(1) and 14(2), respectively. In thisexample, the bracket roller devices 18(1) and 18(2) are installed on theutility poles 14(1) and 14(2), respectively, by coupling the brackets20(1) and 20(2) to the utility poles 14(1) and 14(2) using any knowncoupling method in the art. The bracket roller devices 18(1) and 18(2)are located below the installation rollers 16(1) and 16(2) to provide anangle as the fiber cable transmission line 12 traverses between one ofthe installation rollers 16(1) or 16(2) to the opposing bracket rollerdevice 18(1) or 18(2) during installation as described in further detailbelow. The bracket roller devices 18(1) and 18(2) are positioned on theutility poles 14(1) and 14(2), respectively, at approximately the sameheight above the ground as one another. In one example, the bracketroller devices 18(1) and 18(2) are installed with the roller wheels22(1)-22(4) pre-attached to brackets 20(1) and 20(2). Alternatively, thebrackets 20(1) and 20(2) may be positioned on the utility poles 14(1)and 14(2), respectively, and then roller wheels 22(1)-22(4) may becoupled to the brackets 20(1) and 20(2). In this example, the rollerwheels 22(1) and 22(2) are coupled to bracket 20(1), while the rollerwheels 22(3) and 22(4) coupled to the bracket 20(2). In other examples,additional roller wheels could be utilized on each of the bracket rollerdevices 18(1) and 18(2).

Next, in step 104 a rope is fed through the various rollers to traversebetween the utility pole 14(1) and the utility pole 14(2) as known inthe art of tension pulling overhead transmission lines. Although therope is described as traversing from the utility pole 14(1) to theutility pole 14(2), the rope may alternatively be introduced in theopposite direction. The rope is fed from a source (not shown) thatprovides a tension on the rope in the direction of the source. The ropeextends around a path defined by the installation rollers 16(1) and16(2) and the bracket roller devices 18(1) and 18(2) as described below.

The rope is delivered from the source and inserted through theinstallation roller 16(1). The rope then traverses from the installationroller 16(1) toward the utility pole 14(2) to the bracket roller device18(2). The bracket roller device 18(2) is located at a lower heightabove the ground than the installation roller 16(1) such that the ropetraverses between the utility poles 14(1) to 14(2) from the installationroller 16(1) to the bracket roller device 18(2) at an acute angle. Therope then enters the roller wheel 22(3) and is directed to the rollerwheel 22(4). The rope then traverses back to the utility pole 14(1) fromthe bracket roller device 18(2) to the bracket roller device 18(1) in adirection substantially perpendicular to the utility poles 14(1) and14(2). The rope then enters the roller wheel 22(2) and is directed tothe roller wheel 22(1). The rope then traverses back toward the utilitypole 14(2) from the bracket roller device 18(1) to the installationroller 16(2) at an acute angle generated by the height differencebetween the bracket roller device 18(1) and the installation roller16(2). The rope is inserted into the installation roller 16(2) andextended beyond the utility pole 14(2).

In step 106, the rope is coupled to the fiber cable transmission line 12to be installed at the location beyond the utility pole 14(2). The fibercable transmission line 12 is then tension pulled back through thesystem of rollers including the installation rollers 16(1) and 16(2) andthe bracket roller devices 18(1) and 18(2) in the opposite directionfrom which the rope was inserted as described above with respect to step104. The bracket roller devices 18(1) and 18(2) each include at leasttwo roller wheels 22(1)-22(2) and 22(3)-22(4), respectively, spacedapart on the brackets 20(1) and 20(2) to ensure that the fiber cabletransmission line 12 is not bent at an angle greater than the allowedmanufacturer bend radius during installation. This configuration avoidsbending the fiber cable transmission line 12 at an angle of greater than90 degrees, which may cause damage to the fiber cable transmission line12 or void any warranty thereon. FIG. 1 illustrates the position of thefiber cable transmission line 12 after it is tension pulled using themethods of the present technology.

Next, in step 108, the fiber cable transmission line 12 is mounted to atleast one of the utility poles 14(1) and 14(2) using mounting techniquesknown in the art. By way of example, the installation rollers 16(1) and16(2) may be replaced by mounting hardware, such as a dead end or atangent that securely mounts the fiber cable transmission line 12 to theutility poles 14(1) and 14(2) at the locations where the installationrollers 16(1) and 16(2) were previously located.

In step 110, the portion of the of the fiber cable transmission line 12located between the utility poles 14(1) and 14(2) is released from thebracket roller devices 18(1) and 18(2). This provides a slack portion 24of the fiber cable transmission line 12, which provides excess fibercable transmission line that can be stored on one of the utility poles14(1) or 14(2) for later repairs and/or splices. The slack portion 24 isadvantageously generated without the need to pull back large portions ofthe fiber cable transmission line 12.

In step 112, the slack portion 24 of the fiber cable transmission line12 is gathered together into a fiber roll using known techniques, suchas a figure-eight rolling technique. The amount of the slack portion 24of the fiber cable transmission line 12 is determined by the spanlength, whereas the slack portion 24 will be double the span length.

In step 114, the slack portion 24 is moved to one or the utility poles14(1) or 14(2) for storage thereon. Moving the slack portion 24 to oneof the utility poles 14(1) or 14(2) establishes a portion of the fibercable transmission line 12 that traverses directly between the utilitypole 14(1) and the utility pole 14(2). The remainder of the slackportion 24 of the fiber cable transmission line 12 can then, in step116, be stored on the utility pole.

Accordingly, examples of the present technology provide a method for theinstallation of overhead cable lines that allows for the accumulationnecessary excess fiber during overhead fiber installation tensionpulling procedures. The method utilizes a series of large rollers onportable brackets that can be attached to existing poles or temporarycross arms anywhere along long pulls where excess fiber, or slack, isneeded to be stored for later repairs and/or splices. The installationtechniques advantageously allow for the accumulation of the necessaryexcess fiber cable during the tension pulling, without having to performany fiber pull back. Accordingly, the methods of the present technologyadvantageously allow for more efficient and safer tension pulls.

Having thus described the basic concept of the invention, it will berather apparent to those skilled in the art that the foregoing detaileddisclosure is intended to be presented by way of example only, and isnot limiting. Various alterations, improvements, and modifications willoccur and are intended to those skilled in the art, though not expresslystated herein. These alterations, improvements, and modifications areintended to be suggested hereby, and are within the spirit and scope ofthe invention. Additionally, the recited order of processing elements orsequences, or the use of numbers, letters, or other designationstherefore, is not intended to limit the claimed processes to any orderexcept as may be specified in the claims. Accordingly, the invention islimited only by the following claims and equivalents thereto.

What is claimed is:
 1. A method for overhead transmission lineinstallation, the method comprising: tension pulling a transmission lineover a path between a first support structure having a first mountinglocation and a second support structure having a second mountinglocation, wherein the path extends from the first mounting location onthe first support structure to a first transition location on the secondsupport structure, from the first transition location on the secondsupport structure to a second transition location on the first supportstructure, and from the second transition location on the first supportstructure to the second mounting location on the second supportstructure; mounting the transmission line at the first mounting locationand the second mounting location, wherein the mounting provides a slackportion of the transmission line between the first mounting location andthe second mounting location; and mounting a portion the slack portionproximate to either the first mounting location or the second mountinglocation to provide an overhead transmission line extending between thefirst mounting location and the second mounting location and a remainderof the slack portion.
 2. The method of claim 1 further comprising:storing the remainder of the slack portion of either first supportstructure or the second support structure.
 3. The method of claim 25,wherein the remainder of the slack portion is stored on the firstsupport structure when the portion of the slack portion is mountedproximate the first mounting location.
 4. The method of claim 2, whereinthe remainder of the slack portion is stored on the second supportstructure when the portion of the slack portion is mounted proximate thesecond mounting location.
 5. The method of claim 1 further comprising:installing a first transition device at the first transition locationand a second transition device at the second transition location.
 6. Themethod of claim 5, wherein the first transition device and the secondtransition device each comprise a pair of roller wheels removablycoupled to a bracket, wherein the installing comprises coupling thebrackets to the second support structure and the first supportstructure, respectively.
 7. The method of claim 5 further comprising:removing the transmission line from the first transition device and thesecond transition device after the mounting of the transmission line atthe first mounting location and the second mounting location to providethe slack portion of the transmission line between the first mountinglocation and the second mounting location
 8. The method of claim 20,wherein the path extends from the first mounting location on the firstsupport structure to a first transition location on the second supportstructure at a first acute angle, and from the second transitionlocation on the first support structure to the second mounting locationon the second support structure at a second acute angle.
 9. The methodof claim 1, wherein the path does not include any angles above amanufacture bend radius for the transmission line.
 10. The method ofclaim 1, wherein the transmission line comprises a fiber optic cable.11. A kit for overhead transmission line installation, the kitcomprising: a first roller wheel configured to be coupled to a firstsupport structure and a second roller wheel configured to be coupled toa second support structure, wherein the first roller wheel and thesecond roller wheel are configured to receive a transmission line forinstallation; and a first transition device and a second transitiondevice each comprising a bracket configured be coupled to either thefirst support structure or the second support structure and a pair ofroller wheels configured to be removably coupled to the bracket.
 12. Thekit of claim 11 further comprising: the transmission line, wherein thediameter of the first roller wheel, the second roller wheel, and thepair of roller wheels for each of the transmission line is greater thanthe diameter of the transmission line.
 13. The kit of claim 12, whereinthe transmission line is a fiber optic cable.
 14. The kit of claim 11further comprising: a first mounting device and a second mounting devicefor mounting the transmission line the first support structure and thesecond support structure.